Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia
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Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive volcanic rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Calcite (Honey Calcite and Agate)
Calcium Carbonate (CaCO3)
mineral
Banded Agate with Drusy Quartz
Cryptocrystalline Quartz (SiO2) with macrocrystalline Quartz
mineral
Granite
Intrusive Igneous Rock
igneous
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Chert (Iron-stained)
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary
Chert (specifically Flint or Gray Chert)
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with impurities of Hematite or Goethite
sedimentary
Granite Pebble
Granite (Felsic intrusive igneous rock)
igneous
Flint with Fossil Inclusion
Cryptocrystalline quartz (SiO2) enclosing fossilized organic remains
sedimentary
Turquoise in Matrix
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Banded mica schist
Mica schist, chiefly muscovite/biotite with quartz and feldspar
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Sandstone (Limonitic/Iron-stained)
Sandstone (containing Quartz, SiO2, and Limonite, FeO(OH)·nH2O)
sedimentary
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Sandstone
Clastic Sedimentary Rock
sedimentary
Geode or Concretion
Silica-filled nodule (likely SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Amber Dragonfly Brooch
Succinited (Baltic Amber)
fossil
Quartz Geode with Chalcedony
Silicon Dioxide (SiO2) in Geode Form
sedimentary
Chert Breccia (Yellow Jasper)
Silicon Dioxide (SiO2) - Brecciated Chert
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Chalcopyrite in Gossan
Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix
mineral
Mixed River Pebbles and Jasper
Siliciclastic sediment and microcrystalline quartz
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Claystone Concretion
Septarian Concretion (Ironstone-rich)
sedimentary
Boxwork Siderite or Sepatarian Nodule Weathering
Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment
sedimentary
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous